As a guest I still get: Ladezeit: 0.478s | Max. Speicherauslastung: 21.85 MiB | Abfragen: 505
The extreme count of queries is a red flag. Some of your extensions is probably lousy coded, most likely outdated.
Personally I would NEVER use an extension that causes much load or extra queries.
But again, if it works for you
I've cleared all caches. How can you still get 505 queries?
I've never bothered with queries until recently. I thought this was normal.
Now I've eliminated over 100 queries (extension devspace/verifiedmember), and no one in the guild could get more than 100 queries displayed. Newly registered members were also asked, and they got just under 100 because nothing was in the browser cache yet.
505 queries is a lot and impossible to reproduce. I get no more than 100 queries with every browser I've tested (Chrome, Firefox, Brave, Vivaldi, and a few more).
You had 573 queries, but after I deactivated the extension, You still have 503 queries. You're only missing 70 queries compared to before, but I lost 124 queries by deactivating the extension.